Purple wires on A.O Smith motor

SteveLang

My motor went on my furnace today went and picked up another one and its got a few extra wires on it then the old one, on the old one the wires used were red, white and black, so i got the new one and hooked up sames ones, there is 2 purple wires also yellow and a brown the purple wires are a starter im guessing you need to touch them together to get it to start and also to stop, being im no electrician thats what i gather so i turned the fan to on all the time on thermostat so we have heat for now but how do i do this properly??????

hvactech126

There should be a schematic on the motor. What is the model number of the motor?

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how

I would guess (without seeing what you have) that you've picked up a motor that requires a capaciter, hence the two extra purple wires. Most motors come with a schematic that should show you that. You will need to pick up the proper sized capaciter and then sheet metal screw a strap to hold it on the outside of the fan cage within range of those purple wires.. You should also use a rubber cap or insulater on the exposed connections on the capaciter to prevent anyone from getting an accidental nasty shock in the future.

SteveLang

i did some research it is model OLE1036H , and its for a lennox firnace i have a bryant, looked it up and it does require a capasitor, so if i get a cap for it i shouldnt have and other problems being im not using the proper motor in this furnace?

JJboy

Check if your new motor has the same features.

1/3 HP
1075 RPM
2.6 Amps
Capacitor 7.5MFD

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**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.

SteveLang

all i know without ripping it out again its for a lennox its a 1/3 hp 4 speed A.O Smith motor it looks exactly like the old one A.O. smith model 321p591 , except has the extra wires, my wife might kill me if i start ripping the furnace apart again when its cold

hvactech126

your wife might kill you if your new motor fails because it is not wired properly, but it may have already done the damage and is too late anyway.

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SteveLang

what kinda damage we talking about here, i put it in put the fan on the on all the time and its been going good for last 4 hours or so, if something were to go wrong it shoulda happened right away??

hvactech126

I dont know how you have it wired exactly so I can't comment on specifics. If you don't have a capacitor installed then who knows what damage has been done to the windings. I can't find a pdf with the schematic for your motor. You will have to pull it to look on the motor and see how the schematic shows it wired.

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JJboy

Please tell us how you made the blower motor works without the capacitor.....you're a genius..

__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.

SteveLang

All we did was touch the purple wires and ot started and if you touch them again it will stoo. No genius involved.

JJboy

can you take a picture of the motor label and post it?

__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.